Topics: Radio Program, Physics beyond the Standard Model, Unsolved problems in astronomy, Theoretical...
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Topics: Radio Program, Quantum mechanics, Harvard University alumni, American astronomers, Particle...
Topics: Radio Program, Taxation, American talk radio hosts, Community-based organizations, Civil society,...
Topics: Radio Program, Physical cosmology, Universe, Unsolved problems in astronomy, Energy, Payment...
Topics: Radio Program, Physical cosmology, Universe, Unsolved problems in astronomy, Energy, Particle...
Topics: Radio Program, Dark matter, Theoretical physics, Unsolved problems in astronomy, Physical...
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Topics: Radio Program, Performing arts, Physical cosmology, Fictional orphans, Jane Eyre, American poets,...
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4.0
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Topics: Radio Program, Physical cosmology, Magnetism, Universe, Health, Galaxies, American talk radio...
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8.0
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Topics: Radio Program, Unsolved problems in astronomy, Physical cosmology, Energy, American talk radio...
Topics: Radio Program, Legal professions, Legal ethics, Physical cosmology, Public health, Ceremonies,...
Topics: Radio Program, Dark matter, Physical cosmology, Oxides, Science fiction short story collections,...
Topics: Radio Program, Dark matter, General relativity, Black holes, Galaxies, Astroparticle physics, Milky...
Topics: Radio Program, Physical cosmology, Universe, Unsolved problems in astronomy, Energy, Science...
Topics: Radio Program, Physical cosmology, Universe, Unsolved problems in astronomy, Energy,...
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Topics: Radio Program, General relativity, Dark matter, Galaxies, Parliament of the United Kingdom,...
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Topics: Radio Program, American singers, Rock and Roll Hall of Fame inductees, Taxation, American male...
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Topics: Radio Program, Physical cosmology, Particle physics, Nuclear physics, Association of Public and...
106
106
Nov 30, 2009
11/09
by
NASA/Goddard Space Flight Center Scientific Visualization Studio
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A collection of ground-based All-Sky Imagers (ASI) makes an important component of the THEMIS mission in understanding the interaction of the magnetosphere and aurora. It is sometimes referred to as the sixth THEMIS satellite. Descriptions of the instruments are available on the <a href="http://aurora.phys.ucalgary.ca/themis/">THEMIS-Canada Home Page</a>. Imagery from each camera is co-registered to the surface of the Earth and assembled into a view of the...
Topics: Aurora, HDTV, Earth Science, Sun-earth Interactions, Ionosphere/Magnetosphere Particles, Aurorae,...
Source: http://svs.gsfc.nasa.gov/goto?3590
Paul Giem on Can Biomolecules Last that Long? 6-27-2015 Dinosaur bone has yielded apparent protein and even DNA, in spite of the fact that DNA and protein have long been believed to not last for millions of years. Is this supposition or is there experimental evidence for the previous belief in the relative impermanence of DNA and protein? 1. Schweitzer, M. H. et al. 2013. Molecular analyses of dinosaur osteocytes support the presence of endogenous molecules. Bone 52:414–423 -...
Topics: Second, Look, Seminars, Faith, Science, Loma, Linda, University, Church, CA, California,...
Topics: Radio Program, Communism, Continents, Health, Military tactics, Political terminology, Radio...
Topics: Radio Program, Nuclear power, BBC Television programmes, Trucks, Social psychology, Plumbing,...
Topics: Radio Program, National security, Nutrition, Sleep, BBC Television programmes, Microsoft,...
This report summarizes science analysis activities by the SAMPEX mission science team during the period during the period July 1, 1995 through July 1, 1996. Bibliographic entries for 1995 and 1996 to date (July 1996) are included. The SAMPEX science team was extremely active, with 20 articles published or submitted to refereed journals, 18 papers published in their entirety in Conference Proceedings, and 53 contributed papers, seminars, and miscellaneous presentations. The bibliography at the...
Topics: NASA Technical Reports Server (NTRS), SOLAR PHYSICS, COSMIC RAYS, ENERGETIC PARTICLES, TRAPPED...
This NASA grant has funded studies of cosmic objects observed by both the EGRET detector aboard the Compton Gamma-ray Observatory and Whipple Gamma-ray imaging telescope. The former has sensitivity up to a few GeV and latter has sensitivity starting at about 200 GeV extending up to beyond 10 TeV. Thus these instruments probe some of the most energetic phenomena in the universe. This program has been in place for several years and led to important results referred to below. The Whipple...
Topics: NASA Technical Reports Server (NTRS), COSMIC RAYS, OBSERVATORIES, IMAGING TECHNIQUES, ALPHA...
A process by which metal matrix composites can be made was presented. The process involves putting a powder slurry on fibers to make a precursor green tape. These green tapes are cut, stacked and hot pressed to form the fully dense composite. A computer program was presented which enables complete quantification and control of the process. Once some easily obtained properties of the slurry and its behavior are determined (such as the shrinkage from the wet to green state, and the density of the...
Topics: NASA Technical Reports Server (NTRS), METAL MATRIX COMPOSITES, CASTING, SLURRIES, FIBERS, COMPUTER...
The Program Planning meeting was held on Jan 27-28 at the Washington University, Dept. of Physics. Experiment strategies and details were discussed and milestones mapped. Dr. Ringermacher, the program technical leader and Co-Principal Investigator, presented a Physics Department seminar on the theory and experiment in progress. Following the meeting Professor Conradi (CO-PI) and his students designed the NMR probe and electronics required for the experiment and submitted the drawings to the...
Topics: NASA Technical Reports Server (NTRS), CHARGED PARTICLES, ELECTROSTATICS, FABRICATION, MATHEMATICAL...
The following types of experiments for a proposed Space Station Microgravity Particle Research Facility are described: (1) rheology of assemblies of inelastic, frictional particles; (2) grain dynamics in zero gravity; (3) properties of tenuous fractal aggregates; (4) orientation of weakly ferroelectric dust grains; (5) supersonic nozzle beam; and (6) some astrophysical cluster experiments. The required capabilities and desired hardware for the facility are detailed.
Topics: NASA Technical Reports Server (NTRS), CLUSTERS, DUST, FERROELECTRICITY, FRACTALS, INELASTIC...
The study of combustible particle clouds inside flame tubes is of fundamental scientific interest as well as a practical concern. Only the suspended concentration is important to the combustion process, so that assurances must be provided that a minimum of particles adheres to the tube wall. This paper demonstrates experimentally the ability to minimize adhesion and agglomeration of acoustically-mixed lycopodium particles within a 5-cm diameter lexan flame tube. The area density of particles...
Topics: NASA Technical Reports Server (NTRS), ADHESION, AGGLOMERATION, FLAMES, FLAMMABILITY, PARTICLES,...
Topics: Radio Program, Alternative rock groups from California, Optics, Musical groups from California,...
This report is an analysis of the physical mechanisms that control the aerosol charge distribution established by radioactive neutralizers. Theoretical calculations and modeling is supplemented by experimental findings obtained with both commercially available ionizers of our own design. Keywords: Ionizers, Aerosols, Singly charged particles.
Topics: DTIC Archive, Hoppel, W A, NAVAL RESEARCH LAB WASHINGTON DC, *RADIOACTIVITY, *IONIZATION,...
This paper presents a parallel version of the Fast Multipole Method (FMM). The FMM is a recently developed scheme for the evaluation of the potential and force fields in systems of particles whose interactions are Coulombic or gravitational in nature. The sequential method requires O(N) operations to obtain the fields due to N charges at N points, rather than the O(N Squared) operations required by the direct calculation. Here, we describe the modifications necessary for implementation of the...
Topics: DTIC Archive, Greengard, L, YALE UNIV NEW HAVEN CT DEPT OF COMPUTER SCIENCE, *PARALLEL PROCESSORS,...
Plasma physics processes occurring in magnetospheric plasmas are studied by means of numerical simulations. This study has included the excitation of instabilities due to electron currents and/or ion beams due to the presence of nonuniform electric fields. Our investigations also included the heating and transport of plasma in the presence of particle interactions with excited waves in a collisionless plasma. Extensive numerical simulations have been performed along with the development of...
Topics: DTIC Archive, Nishikawa, Ken-Ichi, IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY,...
The contributions to this conference, are discussed under three general categories: the nuclear force problem, including the possible effects of quark structure; properties of few-nucleon systems, especially as probes of the nuclear force; and atomic and molecular few-body problems and calculational methods.
Topics: DTIC Archive, Haftel, Michael I, OFFICE OF NAVAL RESEARCH LONDON (UNITED KINGDOM), *N BODY PROBLEM,...
Particle velocity histories were measured in spherical wave experiments performed in Sierra White granite (1) to test a technique for increasing the useful signal duration for experiments in small diameter cores obtained from the joint verification experiment (JVE) site, and (2) to determine the effects of the pore space condition on wave propagation and attenuation. The technique used to increase the useful signal duration involved inserting a 6-cm diameter core into a borehole drilled in a...
Topics: DTIC Archive, Miller, S A, SRI INTERNATIONAL MENLO PARK CA, *NUCLEAR EXPLOSION TESTING, *ROCK...
Currently, Chemical Vapor Deposition (CVD) derived zinc sulfide is one of the most widely used infrared optical window materials. Unfortunately, for numerous applications it does not possess optimum mechanical properties. To fabricate infrared transmitting ZnS/ZnS composites requires the development of high aspect ratio, micron sized ZnS whiskers. Although larger ZnS single crystals and whiskers have been made by a variety of high temperature route, alternative routes have been sought for...
Topics: DTIC Archive, Guiton, T A, PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY,...
In Easton and Ronchetti (1986), a method of generalized saddlepoint approximations is proposed and shown useful, especially in the case of small sample sizes. A possible improvement of the method is suggested to prevent its potential deficiencies and increase its applicability. Easton and Ronchetti's approximation and its modified version are extended to bootstrap applications. These results provide a satisfactory answer to Davison and Hinkley's (1988) open question on the bootstrap...
Topics: DTIC Archive, Wang, Suojin, SOUTHERN METHODIST UNIV DALLAS TX DEPT OF STATISTICAL SCIENCE,...
The properties of basic kinetic nonlinearities (e.g., particle trapping, nonlinear Landau damping etc.) in uniform plasmas are well understood. However, in many problems of current interest, plasma nonuniformity plays an important and fundamental role. Although helpful insight can often be obtained using local, or WKB generalizations of nonlinear phenomena in uniform media, such extrapolations often miss important features. Consequently it is of interest to develop a systematic study of...
Topics: DTIC Archive, Morales, G J, CALIFORNIA UNIV LOS ANGELES PLASMA PHYSICS GROUP, *PLASMAS(PHYSICS),...
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5.0
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Topics: Radio Program, Physical cosmology, Developmental biology, Neurotrauma, Psychiatric diagnosis,...
Topics: Radio Program, Albert Einstein, Quantum mechanics, Concepts in physics, Theoretical physics,...
Topics: Radio Program, Climate change, Exotic matter, NPR programs, Physical cosmology, Quantum mechanics,...
Topics: Radio Program, Earth, NPR programs, Mass media, Dark matter, American journalists, American...
Topics: Radio Program, Nuclear power, Energy conversion, Nuclear technology, Nuclear power stations, Power...
Topics: Radio Program, American radio journalists, NPR programs, Particle physics, Dark matter, Legal...
13
13
Jan 26, 2015
01/15
by
Sheryl Fisher Araxis3Talks Araxis 3 Productions
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This podcast is intending to give an extended view of our universe, along with expounding on some aspects of subatomic particle physics.
Topics: physics, subatomic, particles, sheryl, fisher, branes, quarks
Topics: Radio Program, Thomas Edison, Quantum mechanics, Particle physics, American inventors, American...
Topics: Radio Program, Astrobiology, NASA space probes, Health, Nutrition, Planetary science, Science...
Topics: Radio Program, Physical cosmology, Dark matter, General relativity, Harvard University alumni,...
Topics: Radio Program, Earth, Spaceflight, Physical cosmology, Magnetism, Universe, American talk radio...
The internal space-time symmetry and simple supersymmetry of relativistic particles are briefly discussed in terms of the little group of the Poincare group. The little group generators in a finite-dimensional matrix representation of the N = 1 super-Poincare algebra are explicitly constructed. The supergeometry of a massive case continuously becomes that of a massless case in the infinite-momentum limit. The origin of the gage transformations associated with the massless supermultiplets...
Topics: NASA Technical Reports Server (NTRS), FINE STRUCTURE, RELATIVISTIC PARTICLES, SUPERSYMMETRY,...
Long-term variations in ozone have been caused by both natural and humankind related processes. In particular, the humankind or anthropogenic influence on ozone from chlorofluorocarbons and halons (chlorine and bromine) has led to international regulations greatly limiting the release of these substances. These anthropogenic effects on ozone are most important in polar regions and have been significant since the 1970s. Certain natural ozone influences are also important in polar regions and are...
Topics: NASA Technical Reports Server (NTRS), SOLAR ACTIVITY EFFECTS, SOLAR PROTONS, ATMOSPHERIC EFFECTS,...
